| CAUTION | On models equipped with engine immobilizer, if ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES - TOYOTA article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT. |
Circuit Description
Battery voltage is supplied to +BM circuit at ECM as the power source for the Electronic Throttle Control System (ETCS). DTC is set if battery voltage does not exist on +BM circuit at ECM for ETCS. If DTC P2118 exists, ECM will turn off the power to throttle control motor and throttle valve is closed by the return spring. The throttle valve is locked at a certain opening angle. Also, the whole electronically controlled throttle operation is cancelled until the system returns to normal and the ignition switch is turned OFF. Possible causes are
- ETCS power source circuit is open.
- Defective ECM.
Diagnostic Aids
Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.